Heater for shaping eyeglass frames



June 9, 1925. v 1,541,375

n. NEUWIRTH ET AL HEATER FOR SHAPING EYEGLASS FRAMES Filed June 17. 1924 INVENTO ATTORNEY Patented June 9, 1925.

HE MAN NEnwm'rH Am) JACOB BER'NSTEIN, or naooxmm, new YORK.

HEATER SHAPING EYEGLASS FRAMES.

Application filed June 17, 1924. semi No. 720,515.

To. all whom it may concern:

Be it known that we, Harman XnUwm'rH and Jams Brmm'rmmc tiuns of he United States, and residents of the borough of Brooklyn, county of.Kings, and city and State of New York, have jointly invented certain new and useful Improvements 1n Heaters for Shaping Eyeglass Frames, of which the following is a specification.

It is common-practice for Opticians to reshape or resiae spectacle frames of composition material such as celluloid or the like, in order to malre the apertures in th frame fit to some particular lens. The object of the present invention is to provide a simple and efficient device tor heath-lag and sizing the spectacle frameand to provide a frustro conical mandrel of hollow shape over which the spectacle frames are adapted to be applied for heating and shaping, together with means with-in thebase of the device, and consisting preferably of an electric heating member for heating the mandrel, and the mandrel is made to be readily detached from the base in order that ortions of the spectacle frame, such as t e bow, which extends over the ear, may be heated close to the heating member in order to permit it to be reshaped. In addition, we provide a simple and efficient shutter at. the top of the mandrel for controlling outlet apertures of the mandrel in order to regulate the temperature of the mandrel to suit the requirements.

In the drawing forming part of this application,

Figure 1 is an elevation of the device showing the mandrel removed for heating various parts of the spectacle frame,

Figure 2 is a plan view of the device with the mandrel in place, a portion of the man drel being broken away,

Figure 3 is a vertical, sectional view of the device with the mandrel in position for use, and

Figure 4 is a perspective view of the mandrel detached with a portion broken away at the top.

As shown in Figures 1 and 2, there is a base ring 1 having feet 2 secured thereto to use on a table or other support, and a cable 3 for conducting the current from any source of supply, passes throu h this ring 1 and the current passes throu unit 4 supported within the use member 5 which rests upon and is secured to the ring the heating 1 The form of heating unit may be varied but we prefer to use one similar to that which is shown in our copending application, Serial No. 680,315. This comprises a coil of resistance wire 6 suitably arranged on a support 7 of mica or other insulating material. The upper portion of the base is contracted to form a frustro conical neck 8 through which projects a shaft 9 the ends of which extend beyond the outer limits of the neck 8. The top of this neck 8 is closed by means of a plate 10 which is provided with a number of apertures 11 throughout its surface and the purpose of this plate is to prevent any part of the spectacle frame touching the heating unit or coming so close to it as toset it afire, and the perforations in the plate permit the heat to pass upwardly through it. spectacle frame is to be reshaped other than the reshaping to accommodate the lens, the device may be used as shown in Figure 1, so that the portion of the frame which is to be reshaped may be applied close to the source of heat.

There is a frustro conical mandrel 12 of hollow construction, the lower end of which is adapted to fit over the neck 8 and it has bayonet slots 13 in its lower edge which receives the projecting ends of the pin 9. The mandrel isadapted to be placed over the neck 8 until the ends of the pin 9 enter the bayonet slots and the mandrel is then turned to lock the bayonet joint, and the mandrel is thus removably fixed to the base. When the mandrel is thus applied to the base, the heat from the heating unit passes upwardly through the plate 10 and it serves to heat the entire mandrel from the interior. The spectacle frame which is to be resized is placed over the top of the mandrel and it is pressed downwardly thereon until the material of the frame has become softened sufliciently to permit the frame to be forced down upon the mandrel to one of the indicating lines 14 according to the size of the lens to be fitted into the frame. As soon as the frame has been extended to the desired size it is removed and chilled by dipping into water. The top of the mandrel is closed by means of a cap 15 which is provided with several apertures 16 extending through it. Immediately below this cap there is a disc 17 adapted to act as a shutter for either entirely closing the apertures in the cap 15 or for regulating the \Vhen any portion of the cYtent or opening therein and for this purpose the shutter 17 is provided with a number of apertures 18 adapted to register partl} or wholl with the rpertures 16 in the 'ap. The shutter is mounted on a pin it) which extends through the 'ap and is provided with a small operating lmob 2O aboYe the cap. for adjusting the position of the shutter. By regulating the shutter is possible to centrol the tenmerature of nandrel by regulating the release of the Within the mandrel. In this manner and by this simple means we are able to secure a line regulation of the temperature e the mandrel without resm'ting to comilicated adjustment of the cn'rcnt in the c heating nnit.

'inq' described our invention, What We n i. A heater 01'' the class described comprisa base or mtton member having a 'l amber therein, a heating unit in said cl amber. and a hollow. trustm-crmical mandrel detachably secured to said bas so tha '1 its interior will receive the heat from "aid base chamber.

A heater of the class described comprising; a base or bottom member having a chamber therein, a heating unit in said chamber, said base having a trustro-conic: l top neck, and a hollow. trustro-conical mandrel detach bl rennet-red over said neck so that its interior rill receive the heat from said base chamber.

3. A heater or the class descriliied com prising a base or bottom member having a chamber therein, a heating unit in said chambci; a ioramino'us dividing all over said heating unit and a hollow, trustroconical mandrel dei'zuiliably secured to said base that it receives therein the heat. from said chamber, the mandrel being re movable 'l'rom said base to provide closer acre to said heating unit, said foraminous dividing x'all prcwentin; direct contact between the article treated and said heatin; unit.

A heater ot the class desm'ibed comprising a base or bottom member having a heating unit therein, a hollow, frustroconica mandrel on said base. having an apertfured top Wall. and a movable shutter adapted to regulate the (overtures in said top wall for the purpose of regulating the temperature of said mandrel. i

Signed at the city, county and State of Yen York, this th day of June, 1924.

HERMAN NE UWVIRTH. JACOB BERNQTEIN. 

